21232

Appears in sequences

• Sum of the sizes of the Durfee squares of all partitions of n.at n=31A115995
• G.f. satisfies: A(x) = Sum_{n>=0} x^n*[Sum_{k=0..n} C(n,k)^2 *x^k* A(x)^(2k)].at n=9A183876
• Number of nondecreasing arrangements of n numbers in -4..4 with sum zero and sum of squares less than n*20/3.at n=17A183930
• Number of tilings of a 18 X n rectangle using 2n nonominoes of shape I.at n=27A250666
• Number of tilings of a 27 X n rectangle using 3n nonominoes of shape I.at n=18A251078
• Number of binary strings of length n having at least one run of length at least 4.at n=15A265725
• Sum of the abscissae of the first descents of all bargraphs of semiperimeter n (n>=2).at n=9A273898
• Triangle of coefficients of Caylerian polynomials.at n=25A366173